Betev, B.
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rivet Analysis
Observation of a New Isoscalar Vector Meson in $e^+ e^- \to \omega \pi^+ \pi^-$ Annihilation at 1.65-{GeV}

Cordier, A. ; Bisello, D. ; Bizot, J.C. ; et al.
Phys.Lett.B 106 (1981) 155-158, 1981.
Inspire Record 166964 DOI 10.17182/hepdata.31042

The e + e − → ωπ + π − → π + π − π + π − π 0 cross section has been measured at DCI by the DMI experiment in the 1.4–2.2 GeV energy range. A bump in this cross section appears at 1.65 GeV above a small background, with 6.2 s.d. statistical significance. It can be interpreted as a new isoscalar vector meson: ω ′ or ø ′.

1 data table
Table 1

THE INDIVIDUAL SYSTEMATIC ERRORS ARISE FROM THE UNCERTAINTY IN SUBTRACTING THE FIVE-PION (NON-OMEGA) BACKGROUND. THESE ERRORS ARE CORRELATED WITH THE STATISTICAL ERRORS.


A-dependence of Muon Pair Production in $\pi^-$ Nucleus Interactions at 280-{GeV}/$c$

Falciano, S. ; Freudenreich, K. ; Juillot, P. ; et al.
Phys.Lett.B 104 (1981) 416-420, 1981.
Inspire Record 166161 DOI 10.17182/hepdata.31061

We have measured the relative cross sections for muon pair production by 280 GeV/ c negative pions on three different targets: carbon, copper, and tungsten. The value of α obtained from the parametrization σ = constant × A α is 0.94 ± 0.02 ± 0.02, whereas the parametrization σ≈σ 0 ( Z A ) A α′ , where σ 0 ( Z A ) is given by the Drell-Yan model, leads to α ′ = 0.97 ±0.02±0.02. This last result is in agreement with the quark additivity rule which is inherent in the Drell-Yan model, no dependence is observed on the transverse momentum of the muon pair.

2 data tables
Table 1

PARAMETRISATION OF CROSS-SECTION IS SIG=CONST.*A**POWER.

Table 2

PARAMETRISATION OF CROSS-SECTION IS SIG=SIG0(Z/A)*A**POWER WHERE SIG0(Z/A) IS GIVEN BY DRELL-YAN MODEL.


rivet Analysis
Baryon Production in e+ e- Annihilation at PETRA

The JADE collaboration Bartel, W. ; Cords, D. ; Dittmann, P. ; et al.
Phys.Lett.B 104 (1981) 325-329, 1981.
Inspire Record 166363 DOI 10.17182/hepdata.31062

Data on p and Λ production by e + e − -annihilation at CM energies between 30 and 36 GeV are presented. Indication for an angular anticorrelation in events with baryon-antibaryon pairs is seen.

3 data tables
Table 1

No description provided.

Table 2

No description provided.

Table 3

AVERAGE NUMBER OF ANTIBARYONS PER HADRONIC EVENT. AN EXPONENTIAL SLOPE OF 2.5 GEV*-1 IN E WAS ASSUMED IN EXTRAPOLATING E*D3(SIG)/DP**3 TO ALL MOMENTA.


Test of Nuclear Effects in Hadronic Dimuon Production

The NA3 collaboration Badier, J. ; Boucrot, J. ; Bourotte, J. ; et al.
Phys.Lett.B 104 (1981) 335, 1981.
Inspire Record 166153 DOI 10.17182/hepdata.31167

We present the final analysis of the nuclear effects on the cross section of dimuon production, using simultaneously a hydrogen and a platinum target in a 150, 200 and 280 GeV pion beam. For the dimuon mass interval 4.1 to 8.5 GeV, the ratio of the cross sections is in agreement with the Drell-Yan model within a 10% error, mainly due to systematics. The variation of this ratio with the dimuon mass, x 1 and x 2 is also in good agreement, and no variation with the transverse momentum is observed.

5 data tables
Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.

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LONGITUDINAL CORRELATIONS BETWEEN PIONS IN INCIDENT HADRON FRAGMENTATION REGION IN K- p INTERACTIONS AT 32-GeV/c

Bumazhnov, V.A. ; Buschbeck, B. ; Cochet, C. ; et al.
IFVE-81-112, 1981.
Inspire Record 168441 DOI 10.17182/hepdata.41430

None

62 data tables
Table 1

DISTRIBUTION IS PRESENTED IN THE BEAM FRAGMENTATION REGIONS.

Table 2

DISTRIBUTION IS PRESENTED IN THE BEAM FRAGMENTATION REGIONS.

Table 3

DISTRIBUTION IS PRESENTED IN THE BEAM FRAGMENTATION REGIONS.

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PHOTON AND pi0 MESON INCLUSIVE PRODUCTION IN 32-GeV/c K- p INTERACTIONS

Borovikov, A.A. ; Bryukhanova, T.M. ; Galyaev, N.A. ; et al.
IFVE-81-113, 1981.
Inspire Record 168437 DOI 10.17182/hepdata.41429

None

6 data tables
Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.

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Measurement of Quark Momentum Distributions in the Proton Using an Anti-neutrino Probe

Barnes, V.E. ; Carman, T.S. ; Carmony, D.D. ; et al.
Phys.Rev.D 25 (1982) 1-21, 1982.
Inspire Record 166272 DOI 10.17182/hepdata.24027

We present the results of a study of the inclusive reaction ν¯p→μ+X0 for antineutrino energies from 5 to 150 GeV. The data were obtained by exposing the Fermi National Accelerator Laboratory hydrogen-filled 15-foot bubble chamber to a wide-band antineutrino beam. This is the first high-energy antineutrino experiment in which a pure proton target was used. The experimental problems of selecting the required sample of charged-current antineutrino-induced events are discussed in detail. A Monte Carlo simulation of the experiment is used to provide correction factors to the measured distributions. A measurement of the x dependence of the inelasticity (y) distributions gives the proton structure functions F2ν¯p(x) and xF3ν¯p(x) up to an overall normalization constant. When expressed in terms of the quark-parton model, the quark distributions u(x) and d¯(x)+s¯(x) are determined. The results for u(x) are found to be in excellent agreement with models based on fits to electron and muon scattering data. Using these results to fix the u(x) normalization, an absolute measurement is made of x[d¯(x)+s¯(x)], the antiquark momentum distribution.

1 data table
Table 1

VALUES OF Q**2 ASSOCIATED WITH THE FOLLOWING TABLE ARE.... 2.2 , 3.5 , 3.4 , 4.4 , 4.7 , 5.0 , 6.0 , 6.5 , 7.7 , 8.0.


rivet Analysis
SEARCH FOR NARROW QUARKONIUM STATES AND PAIR PRODUCTION OF NEW HEAVY QUARKS AT c.m. ENERGIES FROM 33-GeV TO 36.7-GeV

The CELLO collaboration Behrend, H.J. ; Chen, Ch. ; Field, J.H. ; et al.
DESY-81-029, 1981.
Inspire Record 166365 DOI 10.17182/hepdata.45222

None

1 data table
Table 1

CONTINUOUS COVERAGE OF THREE ENERGY RANGES (33.00 TO 33.80, 34.00 TO 35.26 AND 36.08 TO 36.72 GEV PLUS SEVEN ADDITIONAL DATA POINTS AROUND 35.7 GEV).


A Measurement of the Ratio of Longitudinal and Transverse Structure Functions in Neutrino Interactions Between 30-{GeV} and 200-{GeV}

Abramowicz, H. ; de Groot, J.G.H. ; Knobloch, J. ; et al.
Phys.Lett.B 107 (1981) 141-144, 1981.
Inspire Record 165476 DOI 10.17182/hepdata.31038

A new measurement of the ratio R = σ L / σ T of longitudinal and transverse structure functions in neutrino interactions on iron between 30 and 190 GeV neutrino energy is reported. The result is given as a function of the scale parameter x and the inelasticity ν of the interaction. The average value is R = 0.10 ± 0.07 around ν ≈ 50 GeV and is in accordance with a prediction from the QCD theory.

2 data tables
Table 1

No description provided.

Table 2

No description provided.


Measurement of $e^+ e^- \to e^+ e^-$ and $e^+ e^- \to \gamma \gamma$ at Energies Up to 36.7-{GeV}

The CELLO collaboration Behrend, H.J. ; Chen, C. ; Field, J. ; et al.
Phys.Lett.B 103 (1981) 148-152, 1981.
Inspire Record 165288 DOI 10.17182/hepdata.31169

The differential cross sections of the reactions e + e − → e + e − and e + e − → λλ are measured at energies between 33.0 and 36.7 GeV. The results agree with the predictions of quantum electrodynamics. A comparison with the standard model of electroweak interaction yields sin 2 θ W = 0.25 ± 0.13.

2 data tables
Table 1

No description provided.

Table 2

No description provided.